Justin Beiber and Selena Gomez are back together enough to where they were spotted skiing in Utah with ... Taylor Swift and Harry Styles.

It's all I can do to keep myself from screaming.

No ... really.

That's a lot of star power for one mountain. According to People.com, the quartet was spotted at The Canyons resort in Park City the weekend before Christmas, with experienced skiers Swift, 23, and Styles, 18, hitting the slopes. The more novice Gomez, 20, also skied after a lesson. Bieber, 18, went snowboarding with his bodyguards.

That's right. You better not be a tree that looks at Chilly Biebs the wrong way with that posse.

The two couples stayed in separate rental houses at the Colony in Park City, and Swift and Styles had a cozy lunch together at the resort's Red Pine Lodge.